1Center of Excellence for Power Systems Automation and Operation,Department of Electrical Engineering, Iran University of Science and Technology, Tehran, Iran

2Center of Excellence for Power Systems Automation and Operation,Department of Electrical Engineering, Iran University of Science and Technology, Tehran,Iran

Abstract

DC microgrids and distribution systems will have an important role in the future electrical power system, i.e., smart grids. One of the most important issues of dc microgrids and distribution systems is the correct and fair determination of the energy prices of the consumers. In this paper, a novel, practical, accurate, fair nodal price, namely the real nodal price, is proposed to determine the energy payments of the consumers in dc microgrids and distribution systems. Applying the real nodal price, each consumer will exactly pay for its real energy costs, i.e., its accurate consumed energy and originated energy loss. The real nodal price is applicable to different dc microgrids and distribution systems, even those with mesh configuration and numerous distributed generators. The real nodal price leads to zero merchandising surplus. Besides, through the presented novel method in this paper, the real nodal price is computed by a few simple and fast calculations. Also, no slack bus is necessary to be assigned to compute the real nodal price. In this paper, the real nodal prices of a dc microgrid are derived through the presented method. The analyses and simulation results confirms the mentioned remarkable features of the real nodal price.